Journal
ENERGIES
Volume 10, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/en10071011
Keywords
battery string; layered bidirectional equalizer; buck-boost converter; balancing speed
Categories
Funding
- DongGuan Innovative Research Team Program [2014607119]
- Guangdong Province Science and Technology Program [2014B010125002]
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To eliminate the influence of the inconsistency on the cycle life and the available capacity of battery packs, and improve the balancing speed, a novel inductor-based layered bidirectional equalizer (IBLBE) is proposed. The equalizer is composed of two layers of balancing circuits connected in parallel. Each layer contains multiple balancing sub-circuits based on buck-boost converters. These balancing sub-circuits can equalize the corresponding cells simultaneously, and allow the dynamic adjustment of equalization path and equalization threshold. Analysis and simulation results demonstrate the IBLBE has a higher level balancing speed than other equalizers based on switched-capacitor or switched-inductor converters, and reduces the balancing time by 30% compared to existing inductor-based parallel architecture equalizers (PAEs). Experimental results are presented to validate the analysis and effectiveness of the proposed equalizer.
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